Knowledge of plastic-Classification of recycled plastic granules.

With the resin types included in commodity grade plastics are identified in the resin coding system,recycled plastic granules are classified mainly based on the use of different materials, as well as the plastic characteristics after processing, generally divided into three grades:first, second and third.

First grade is the raw material used is no landing scrap, otherwise known as the bottom corner of the material, some of which are outlet material, the first plastic material, such as, the quality is good, is not used in the process of processing of new plastic materials among the remaining small corners or low quality raw materials. For example, in the processing PP bags (also named as PP woven bags) during the leftover bags to the processing of wool out of these particles, better transparency, and its quality can be compared with the new material, it is material or grade level material.

Secondary raw materials means has been used once, except for the high-pressure granulation, granulation using high-pressure large majority of imports, imports of large industrial film if there is no wind and the sun through, so its quality is also very well, working out of the plastic particles crisper transparency is good, then it should be based on whether the brightness and the surface roughness of the particles to determine.

Refers to three raw material has been used twice or more times, the particles out of the processing, all aspects of its flexibility and toughness are not good, can be used for injection molding.

First, the two materials can be used for blown film, drawing and other purposes.Plastic grade: close to the raw material, raw material prices 80-90%;A: 70-80% of raw material prices;Two: 50-70% of raw material prices;Three: 30-50% of raw material prices.

Sometimes from the quality point: drawing, blown, spinning, one, two, injection filling. Or the same level of re-classification.

Some retail stores and grocery stores have begun accepting LDPE(low density polyethylene) plastics (mainly grocery bags) for recycling at individual locations, generally picking up these products curbside from residences on a weekly schedule. However, curbside recycling programs rarely accept polyvinyl chloride, polypropylene and polystyrene.

A business man who always specilized in importing and exporting,import and export many kinds of plastic raw materials and packaging products.